| 青藏线棚车在强横风下的倾覆稳定性 |
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| 引用本文： | 高广军,段丽丽,苗秀娟.青藏线棚车在强横风下的倾覆稳定性[J].中南大学学报(自然科学版),2011,42(4). |
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| 作者姓名： | 高广军 段丽丽 苗秀娟 |
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| 作者单位： | 中南大学交通运输工程学院,轨道交通安全教育部重点实验室,湖南长沙,410075 |
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| 摘 要： | 采用缩比棚车模型风洞实验的方法研究棚车在5 m高路堤和15 m高桥梁上的气动性能,得到气动力系数与侧滑角之间的关系,在此基础上,根据静力矩平衡原理建立棚车整车在轨道上倾覆及车体在转向架上倾覆的数学模型,得到车辆在直线和曲线上运行时车辆运行车速和临界倾覆风速关系.研究结果表明:路堤或桥梁上棚车的气动力系数均随着侧滑角的增大而增大,在桥梁上侧滑角为75°时达到最大值,之后稍微降低;车体在转向架上倾覆时的临界风速小于车辆整车在轨道上倾覆的临界风速,车辆的安全速度限值应当以车体在转向架上倾覆为基础进行研究;车辆在曲线上静止时,其在路堤和桥梁上的临界倾覆风速分别为37.0和39.5 m/s,当车速为100km/h时,其临界倾覆风接近30 m/s;若车辆在直线上静止时,其在路堤和桥梁上的临界倾覆风速分别为45.0和49.0 m/s,当车速为120 km/h时,在路堤或桥梁上棚车的临界倾覆风速接近33 m/s.
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| 关 键 词： | 棚车 倾覆稳定性 风洞试验 气动性能 横风 |
Overturning stability of box-car on Qinghai-Tibet railway line with strong cross wind |
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| GAO Guang-jun,DUAN Li-li,MIAO Xiu-juan.Overturning stability of box-car on Qinghai-Tibet railway line with strong cross wind[J].Journal of Central South University:Science and Technology,2011,42(4). |
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| Authors: | GAO Guang-jun DUAN Li-li MIAO Xiu-juan |
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| Institution: | GAO Guang-jun,DUAN Li-li,MIAO Xiu-juan (Key Laboratory of Traffic Safety on the Track of Ministry of Education,School of Traffic and Transportation Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | Scaled model and wind tunnel test were used to research on the aerodynamic performance of the box-car on 5 m high embankment and 15 m high bridge,and the relationship between the aerodynamic coefficients and the side sliding angle was gotten.Based on this,math models were built of the whole train overturning on the track and the car-body overturning on the bogie according to static moment balance,and the relationship between running speed and critical overturning wind speed was also gotten when they are run... |
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| Keywords: | box-car overturning stability wind tunnel test aerodynamic performance cross wind |
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